I am looking for advise on what Cobb off the shelf tune I should run for initial start up or should I tune it right away. Here are my motor specs.

1. 2.5 L hybrid setup- New STI short block with 2.0L heads machined to match 2.5L combustion chamber so stock compression.
2. 1000cc injectors
3. Cobb short ram intake
4. Equal length headers
5. 20 G turbo
6. Boyds tank and fuel pump
7. AWIC
8. Cobb Access port V3
9. 2004 WRX ECM

I was told that with this setup the stock tune will run really rough and is probably not recommended. I have looked through the available tune and couldn't find some a tune that was close to my setup. I am only looking to start it up, bleed the coolant system, and do my go cart drive shake down. I have some time while I wait for my wiring harness to get back from iWire but would like to be proactive. I am ready to fire once the harness comes int. Any input would be greatly appreciated.

Thank you in advance.